Embroidering-machine.



J. A. GROEBLI. EMBROlDERINGMACHINE. APPLICATION FILED MAY 24, 19|7.

Patented Apr. 23,1918.

a SHEETS-SHEET 1.

Imwenior:

J. A. GROEBLI. EMBROIDERING MACHINE. APPLICATION man MAY 24. HI?- Paianted Apr, 23, 1918.

3 SHEETS-SHEET 2.

J. A. GROEBLI.

Emsnomemmc MACHINE.

APPLICATION FILED MAY 24, 19!?- 3 SHEETS-SHEET 3.

Patented Apr. 23, 1918.

FFI@E.

Josnrn A. enonnnr, or new roan, 1v. Y.

EMBROIDERING-MACHINE.

ll,2b3,832.

Specification of Letters Patent.

Patented Apr, ea, rare.

Application filed May 24, 1917. Serial No. 170,615.

To all whom it may concern: 7

Be itknown that I, JOSEPH A. GROEBLI, a citizen of the United States, residing at No. 307 West Fourth street, city, county, and State of New York, have invented new and useful Improvements in Fmbroidering-Machines, of which the following is a specification.

My invention relates to embroidering machines wherein the fabric to be embroidered is-carried upon a tambour frame which is moved, step by step, into successive positions appropriate for the application of the de sired embroidery by'reciprocating needles. And my improvements-are directed to means for facilitating the placing of the fabric upon the fabric holders carried by the tambour frame, and its removal therefrom,the particulars of my improvements being hereinafter. pointed out and claimed.

In the drawings F igure 1 is a rear elevation of the chine, partially broken away for clearness, and of its tambour frame, the figure being shortened by the omissionof medial portions; Fig. 2 is across sectional view of the same, taken on the line 2-2 of Fig. 1, looking to the right, the fabric supplying rollers being also shown; Fig. 3 is a rear elevation of the disconnectible roller truing mechanism; Fig. 4 is a cross sectional View of the same looking to the right on Fig. 3, the disconnectible portions being bent backward; Fig. 5 is aplan view of the same; and Fig. 6 is a plan view of the slotted guide for theroller truing bars, shortenedby the omission of a transverse section toward the left; Figs. 3, 4, 5 and 6 are 011 an enlarged scale Similar parts are designated by corresponding reference numerals in all the figures.

The main frame of the in a conventional form, as embodying ends 1, 1, with bars 3, 3, connecting the same.

nd in this frameis mounted the tambour frame 4, which is carried by counterbalanced and linked levers 5, 5, so that it may be readily moved into the desired stitch positions in the manner and by the means which are well understood in the art,.and which, for that reason, I have not illsutrated.

In this tambour frame 4 are mounted the the fabric rollers, which ,I have illustrated machine is shown frame of an embroiderim ma-V Figs. 2 and 4-. The upper ends of vsuitable as consisting of two pairs of rollersfi, 7,

poll the tambour frame is mounted a shaft 10, the function of which is to furnish power for the operation of the anti-distortion devices for the fabric rollers. The devices which I have illustrated consist essentially of a worm 11 upon the shaft 10, meshing with the worm gear 12 threaded upon the upper end of abar 13 which carries brackets 14 engaging below the upper fabric rollers and which is vertically movable through other bar 17, the lower guide secured to the bottom of the tambour frame. This bar 17 carries brackets 18, 18 engaging above thelower fabric rollers 7, 7.

This general arrangement of roller supporting bars and brackets is not new, and has been illustrated by me in previous patcuts; but in the present instance, I have i11- troduced into the arrangement certain-novel fiiatures which I will now proceed to exp Instead of the bars 13 and 17 being integral, asin previous constructions, I form them each in sections which are hinged together at 19 and 20, respectively, so that the upper ends of the bars 13 and 17 may be bent backward into the position shown in the hinged portions of the rods 13 and 16 pass through a head block 21, which is provided with a positioning guid the tapered pin 22, which pin is adapted, when the head block is swung up against the bracket 23 on the tambour frame, to seat itself in the socket 24- in the bracket 23, thereby accurately positioning the worm gear 12 in relation to the worm 11, and bringing them into operative meshing relation.

The head block 21 should be securely locked in this operative position. And for that end I employ a clamp 25 hinged at 26 to the bracket 23 and provided with a set screw 27, whereby its other end may be firmly clamped against the head block 21 to lock it securely against the bracket 23.

When the upper ends 17 are released and turned back, as in Figs. 2 and 4;, it is desirable to support the bars 13 and 17 against displacement. And for that purpose I provide a suitable guide 28,

guides 15, 16 attached to an 15 being also e or guides such as of the bars 13 and i bour which is attached to a bar 3 of the machine frame, andis provided with a widened end 29, having aslot 30 therein through which the bars 13 and 17 pass. This slot permits 5 the bars 13 and 17 to follow the lateral and vertical movements of the tambour frame without being restricted by the guide 28. The guide prevents the bars 13 and 17 from being swung toward or away from the tamframe when their upper ends are dis connected and bent back therefrom. On the frame 1 of the machine, I provide suitable supports, suchas the brackets 31,31 for supporting the fabric-supplying rollers 32, 32; Upon these rollers the fabric which is to be embroidered is wound before it is placed in the tambour frame. And as it is transferred-from the supply rollers, 32, 32 to the lower fabric rollers 7, 7, itis desirable I 20' that a certain amount of tension should be placed upon the fabric so that it may be rolled snugly and "evenly upon the rollers l Ihaveillustrated in thedrawings a simple method of accomplishing this result,

' which consists in mounting "toothed or roughened'wheels 33, '33. upon the axles of the rollers 32, 32, and so positioning the axles in sockets in the brackets 31, 31, that the periphery of these wheels shall bear 'againstthe'faces. of friction blocks 34, 3d,

' attached to the brackets 31, 31.

' These friction blocks are preferably of 7 wood or other non-metallic material, and

I they act as brakes upon therotation of the rollers 32, 32 as the fabric'is being drawn therefrom. My improved mechanism may be operated as follows: 7 V V V It is customary in the art to reel the un- 40 embroidered fabric upon the lower fabric rollers 7,7, and, to wind the finished embroidery' around theupper-fabric rollers 6, 6, so as to present fresh portions of the fabric to the needles'for embroidering as the work progresses. When, therefore, the work upon any particular piece of fabric has been completed, the finished product, except its last end, will be rolled upon the upper V rollers 6,6. And it then becomes necessary to remove the finished embroidery from the 1 machine and to place new fabric therein so that thework may be continued. For convenience of operation it is desirable to do this from the rear or shuttle side of the machine. But this has been interfered with by the ordinary means of roller truing and other mechanisms whichhave been employed.

' In the use of my improved mechanism,

Y however, this interference is avoided, as follows v I. V

v The fabric is first preferably reeled up upon the upper, roller'6 until its end can be freed from the lower roller 7 to which it has been detachably attached inany well known manner, as for instance, by the use of a needle pointed holding bar attached thereto. The clamp 25 is then loosened and swung back away from the head block 21; and the 'head blockis bent back and away from the tambour frame. The fabric is then drawn off of the fabric roller 6, the roller either being turned by power or by hand, as desired.

The fabric from the lower roller 6 is drawn up behind the upper roller 7 and the upper roller 6 and out over the latter roller. And in this manner the fabric is removed from both sets of rollers and taken out at the back of the machine. New fabric having been placed upon the supply rollers 32, 32, and those rollers having been put in proper position upon the brackets 31, 31, the fabric therefrom may be drawn over behind the upper roller 6 and down, so that the fabric from the forward roller 32 can be connected to the upper roller 7, and the fabric from the inner roller 32 may be connected to the lower roller 7 as indicated in Fig. 2. The fabric may then be reeled from the supply rollers 32, 32 on the lower rollers 7, 7, by turning the rollers in the proper direction. \Vhen the fabric has been drawn off of the supply rollers 32, 32,

any inequality in the amount remaining for attachment tothe proper upper roller 6 may be taken care of by independent movements of the fabric rollers. The upper ends of the fresh fabric are then attached to their proper rollers 6, 6-, and the slack is taken 'up and the fabric properly adjusted by turning the rollers as required.

When the fabric. has been properly placed on the rollers 6-, 7, 6, 7, the head block 21 is swung back intoplace, so that the worm gear 12 will mesh with the worm 11, and the head block is secured in place by clamp 25.

It will be understood that the particular forms of means which I have illustrated for carrying into effect my improvements are used as types of desirable mechanical constructions: and I do not desire to limit myself simply to the specific forms shown.

Having thus described my invention, what I claim and desire to secure by Letters' Patent of the United States, is:

1. In an embroidering machine of the class mentioned, the embodiment of a tambour frame, fabric holding and transferring elements and permanently attached antidistortion mea-nsassociated therewith and disposed transversely thereof and provided with an upper portion adapted to form a readily detachable connection between the anti-distortion means and the tambour frame.

2. Inan embroidering machine of the class mentioned, the embodiment of a tambour frame, fabric holding and transferring elements and anti-distortion means associated therewith and disposed transversely thereof and provided With a relatively displaceable hinged portion adapted to be detachably attached to the tambour frame by its free end.

3. In .an embroidering machine of the class mentioned, the embodiment of a tambour frame, fabric holding and transferring elements and anti-distortion means associated therewith, unitary means for operating said anti-distortion means, and means forcreating a free fabric passage by disconnecting said operating means from said anti-distortion means and displacing a portion of such anti-distortion means,

Without disturbing the other portions of the I anti-distortion means.

l. In an embroidering machine of the class mentioned, the embodiment of a tambour frame, fabric holding and transferring elements, and distortion preventing and rectifying means associated therewith and including permanently attached main portions and terminal portions adapted to be readily attached to and detached from the tambour frame to form a fabric passage Without disturbing the main portion of said distortion preventing and rectifying means.

Wales or thin patent may be obtained for five cents each, by addressing the 5. In an embroidering machine of the class mentioned, the embodiment of a tambour frame, fabric holding and transferring elements, anti-distortion means disposed transversely of and behind the said elements and frame, unitary means for operating said anti-distortion means, and means for temporarily displacing a portion of said anti-distortion means and disconnecting the 7 same from said operating means, Without disturbing the remainder of the anti-distortion means, to create a fabric passage from the fabric holding and transferring elements through the tambour frame to the rear.

6. In an embroidering machine of the class mentioned, the embodiment of a tambour frame, fabric holding and transferring elements, anti-distortion means, means carried by the tambour frame for actuating the anti-distortion means, and means for readily connecting and disconnecting the anti-distortion means with the actuating means, so as to form an uninterrupted fabric passage past the anti-distortion means Within the tambour frame.

JOSEPH A. GROEBLI.

Commissioner of Patentt,

Washington, D. Q." 

